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Earth's Trapped Gas Fed the Early Atmosphere
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| Topic: Earth |
09/27/11 |
| Summary: A new study demonstrates how salty water and gases transfer from the atmosphere into the Earth's interior. The research provides new insight into the evolution of our planet. Studying the physical processes of Earth can help astrobiologists understand what makes a planet habitable. |
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Diamonds Illuminate Earth's Deep Mantle
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| Topic: Earth |
09/19/11 |
| Summary: New research shows that oceanic crust can make its way right down to the lower mantle (deeper than 660km) and then be transported back to the surface. |
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It's a Small World After All
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| Topic: Earth |
08/19/11 |
| Summary: Using measurements from space, scientists have confirmed that, although the surface of the Earth is constantly changing, the planet is not expanding. |
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Oxygen's Watery Past
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| Topic: Earth |
08/19/11 |
| Summary: Prior to the 'Great Oxidation Event', when Earth's atmosphere became rich in oxygen, reserves of the gas may have been stored in the oceans. The evidence of 'oxygen oases' in the oceans can be seen in tiny aerobic organisms that evolved to survive on extremely low levels of oxygen in these undersea habitats. |
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Ancient Tides Higher Than Today
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| Topic: Earth |
08/15/11 |
| Summary: New research shows how the Earth's tides have changed dramatically over thousands of years - and may change again in the future. |
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Living Dangerously
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| Topic: Earth |
08/11/11 |
| Summary: In an exclusive podcast for astrobio.net, Dr. David Grinspoon, astrobiology curator at the Denver Museum of Nature & Science, discusses our violent Earth. He explains why earthquakes, severe weather, and other aspects of the dynamic environment may be necessary for life to exist. |
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What Keeps the Earth Cooking?
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| Topic: Earth |
07/20/11 |
| Summary: New research is helping scientists understand fundamental properties of the Earth, such as the spread of sea floors and melting of the outer core. |
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Earth's Core is Melting and Freezing
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| Topic: Earth |
07/04/11 |
| Summary: New research shows that the Earth's core is simultaneously melting and freezing due to the circulation of heat in our planet's mantle. |
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